PranaNet
AQI 311
← bkc-01.prananet.eth
← #452#454 →

Reading #453

192Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 02:52:00 IST

PM2.5
87.7 µg/m³
PM10
87.7 µg/m³
Temperature
21.3 °C
Humidity
69.5 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x1633078e61757be03adaea1f31f5179ee9a9da283b7f208a8de4f23a9dedce82
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 02:53:07 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1794000120nonce = 453pm25_x10 = 877pm10_x10 = 877simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 453).ownedBy(0x3a1f21f1c6f05efa35bb7178274b41c8873cca67)

Check it yourself

Your browser just repeated the check the Readings contract does on-chain. The relayer only pays gas: changing any value would break the signature.

  1. ✓
    Step 1

    Rebuild the 264-byte message

    #FieldTypeBytesValuePacked hex
    1deviceaddress200x4379c30ae56431f0485731f6e730ee0084e955c00x4379c30ae56431f0485731f6e730ee0084e955c0
    2epochuint2563217940001200x000000000000000000000000000000000000000000000000000000006aee44f8
    3pm25_x10uint256328770x000000000000000000000000000000000000000000000000000000000000036d
    4pm10_x10uint256328770x000000000000000000000000000000000000000000000000000000000000036d
    5temp_x10int256322130x00000000000000000000000000000000000000000000000000000000000000d5
    6hum_x10uint256326950x00000000000000000000000000000000000000000000000000000000000002b7
    7nonceuint256324530x00000000000000000000000000000000000000000000000000000000000001c5
    8chainIduint25632111551110x0000000000000000000000000000000000000000000000000000000000aa36a7
    9readingsContractaddress200x9192Fc053e1493EB2B7355192aa3F8e57AAE01d80x9192fc053e1493eb2b7355192aa3f8e57aae01d8

    abi.encodePacked, no padding between fields. chainId and contract stop replay on other chains. Total: 264 bytes.

  2. …
    Step 2

    Hash it with keccak256

    …
  3. …
    Step 3

    Recover the signer from the EIP-191 signature

    r 0x60c0b0bba5a811445564efbdb38c0d8a5bdcb795a316a0134f46b3e914c8a0cc
    s 0x6232f0449d64f5586077fdcf8e4bde3a165e9c682b17f1adc125697fff63e2ba
    v 28
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 453 follows #452, so this reading can't be replayed.
  6. ✓
    Step 6

    Cross-checked against neighbours

    Not flagged. The value agrees with neighbouring devices within the verifier's threshold.

Raw reading JSON
{
  "device": "0x4379c30ae56431f0485731f6e730ee0084e955c0",
  "ens": "bkc-01.prananet.eth",
  "geohash": "te7u6n",
  "epoch": 1794000120,
  "pm25_x10": 877,
  "pm10_x10": 877,
  "temp_x10": 213,
  "hum_x10": 695,
  "nonce": 453,
  "signature": "0x60c0b0bba5a811445564efbdb38c0d8a5bdcb795a316a0134f46b3e914c8a0cc6232f0449d64f5586077fdcf8e4bde3a165e9c682b17f1adc125697fff63e2ba1c",
  "simulated": false
}